Universal machine tool



Y L 3 F.'W.- HACK 2,318,938

UNIVERSAL MACHINE TOOL Filed May 1, 1940 5 Sheets-Sheet 1 ficmk W Hack May 11, 1943. F. w. HACK UNIVERSAL MACHINE TOOL.

Filed May 1, 1940 5 sh ets-sheet 2 III III!

m 4. all /9 i a?! 7 5 f 3 2 May 11, 1943.

F. W. HACK I UNIVERSAL MACHINE-TOOL Filed May 1, 1940 5 Sheets-Shet a m um mm .1:

II I I lllll lllllllllllll illllllllllillll all! ' IIIII ay '11,- 1943. w. HACK 2,318,938 a UNIVERSALfiACHINE TOOL Filed May 1,- 1940 s Sheets-Sheet 4 IMIIII I 501% [4/ H d May 11, 1943. F w, HACK 2,318,938

UNIVERSAL MACHINE TOOL Filed May 1, 1940 5 Sheets-Sheet 5 I64- E J nor} I8! F 1 '80 |8I+ l I:

: :5 |85 1., 1 I I I U 18a g 1:; I

VEUF

Patented May 11, 1943 umrso STATES PATENT OFFICE UNIVERSAL MAGHIN E TOOL Frank W. Hack, Des Plaines, IlL, assignor to Reconstruction Finance Corporation, Chicago, 111., a corporation of the United States Application May 1, 1940, Serial No. 332,677

13 Claims.

My invention relates to a machine having a wide range of utility and especially adaptable for precision machine work and tool and die making for the performance of work which heretofore had to be accomplished on separate machines.

The machine of this invention is of the type disclosed in my co-pending application Serial No. 151,153, filed June 30, 1937, and issued into Patent No. 2,181,128, dated November 28, 1939, and the invention involves a number of improvements over the machine disclosed in such patent so as to simplify some of the operations and increase the range of adaptability of the machine.

My improved machine is shown on the accompanying drawings, in which:

Figure 1 is a front elevation of the machine;

Figure 2 is a rear elevation;

Figure 3 is a plan view;

Figure 4 is an enlarged section on the plane IVIV of Figure 1;

Figure 5 is a section substantially on the plane V-V of Figure 4;

Figure 6 is an enlarged section on the plane VIVI of Figure 4;

Figure 7 is an enlarged section on the plan VII-VII of Figure 4;

Figure 8 is an enlarged section on the plane VIII-VIII of Figure 1;

Figure 9 is an enlarged section on the plane IX-IX of Figure 8;

Figure 10 is an enlarged view of the upper portion of Figure 6;

Figure 11 is a front elevation of the upper part of the ram structure, with the master head down and with vertical and auxiliary heads supported by the master head;

Figure 12 is a section on the plane XII-XII of Figure 11;

I Figure 13 is a section showing a modified form of auxiliary head for attachment to the vertical head; and

Figure 14 is a section on the plane XIV-XIV of Figure 5.

Referring to Figures 1 to 4, the machine comprises a supporting frame or pedestal structure B, a ram structure R and a table structure T. The supporting frame or pedestal B is of gene-rally rectangular cross-section and is hollow, and on its .rear side has a dovetail vertical guide extension or rail It] for guiding the vertical movement of the ram structure, as best shown in Figure 8. The ram structure on its front side has dovetail guide flanges between whichthe guide rail I0 is received. A suitable frictionreducing bearing roller structure I 3 is interposed between the guide rail and the flanges, and the flange I2 is in the form of an adjustable gib for taking up wear and assuring intimate engagement of the ram structure with the guide rail so as to assure accurate movement of the ram and hold it to its vertical movement without give or play. The ram structure may be strengthened by ribs 14.

Referring particularly to Figures 4 and 5, the base structure has a transmission gearing housing 15 therein-supported by the rear wall thereof. J ournalled in the gear housing and the rear wall is a shaft I6 whose outer end supports a hand Wheel IT. The ram structure at its lower end has a transversely extending rectangular cross-passageway 18 in which-a yoke I9 is slidable. An eccentric 20 forming part of or secured to the shaft l6 receives the eccentric hub 21 of the hand wheel 22, this hub being journalled in the yoke I9. With this arrangement, the outer eccentric 21 may be set by the hand wheel 22 relative to the hand wheel I! and the eccentric 20 for any desired length of vertical stroke of the rain structure when the shaft [6 is turned. A set screw extends from the handle 22 through the slot 24 in the hand wheel 11, and after a setting operation, the set screw is tightened to maintain the setting for the desired stroke.

A worm wheel 25 within the gear housing 15 is keyed to the inner end of the shaft l6 and meshes with a worm pinion 26 on the shaft 21 journalled in the gear housing above the Worm gear, the shaft outside of the base structure B terminating in a hand wheel 28 for hand-turning of theworm shaft and vertical setting of the ram structure R. 0n the side of the base structure B opposite to the hand wheel 28 is mounted an electric motor 29 which projects a distance into the base B with the end of its armature shaft 30 extending into the gear housing l5 for detachable key-connection with the inner end of the shaft 21. The worm shaft .can thus be power driven for driving of the eccentric structure and vertical reciprocation of the ram structure. A set screw 3|, extending through a longitudinal slot 32 in the ram structure, will serve to rigidly lock the ram structure against vertical movement if, in the use of the machine, the ram structure is to be locked in a certain vertical position.

With the motor or armature shaft 3ll detachably keyed to the'worm shaft, as best shown in Figure 5,the motor may be readily removed at II and I2 thereof, at best shown in Figure 4.'

Mounted on top of the ram is a gear housing 39 which journals the upper end of a screw shaft 40 which extends through the dovetail extensions 31 and 38 of the master head frame structure, so that upon turning of the screw shaft, the master head may be adjusted or shifted vertically on the ram structure.

Within the housing 39, a worm gear M is secured to the screw shaft and is meshed by a worm pinion 42 mounted on the shaft 43 extending into the housing, the outer end of the shaft having a hand wheel 44 by which the shaft may be manually operated for adjustment of the master head. Set screws 45 extend through the longitudinal slots 40 in the ram into threaded engagement with the master head frame so that the master head may be locked against vertical movement in any of its set positions. The screw shaft 40 extends through the dovetail extensions 31 and 38 at one side thereof so as to clear the set screws. As shown in Figure 2, the shaft 43 may extend entirely through thehousing 39, with the hand wheel 44 at one end thereof and a similar hand wheel 44' at the other end thereof, so that the shaft maybe manually controlled from opposite sides of the machine for setting of the master head.

The screw shaft 40 may also be power driven. Referring to Figures 8 and 9, a gear housing 41 is mounted on the right side of the base B below the top thereof, and within the base is the motor 48 whose armature shaft 40 projects into the housing 41 and carries a Worm pinion 50. The worm pinion 50 meshes a worm gear for drivinga shaft 52 extending transversely through and rearwardly from the housing 4'! into a housing 53 at the end of a supporting bracket 54 on the base structure. Within the housing '53, the outer end of the shaft 52 carries a bevel gear 55 which meshes with a bevel gear '56 on the vertical shaft 51, this shaft extending upwardly through a bearing bracket 58 '(Figure 1) at the upper end of and movable with the ram, the upper end of this shaft mounting a bevel gear 59 meshing with a bevel gear 60 on the shaft 43 which controls the rotation of the screw shaft 40 for the master head. As the ram at times moves vertically relative to the base B, and the shaft 52 and housing 53 are on the base B, the shaft 51 is longitudinally slidable relative to the housing 53 and is provided with a keyway 61 receiving a pin 62 on the bevel gear 56.

The driving worm wheel 5| may be directly connected to the shaft 52 for drive of the vertical shaft 57 but provision is preferably made for adjusting the speed of rotation of the shaft 51 and the screw shaft 40 for predetermined rate of travel of the master head on the ram, as, for example, where a drill or other tool is to be fed into work on the table T at a predetermined rate. Speed-changing mechanism is therefore associated with the driving gear 51, and instead of direct connection of this gear with the shaft 52, the gear 5I is connected to a gear 63 on a shaft 64 which is co-axial with the shaft 52, the gear 63 being in mesh with a gear 65 on a countershaft 66. Gears 61 are mounted on the shaft 66 for connection with companion transmission gears 58 on the shaft 52. Slidable in the shaft 66 is a key 69 for selectively keying any one of the gears 51 to the shaft 66. The outer end of the key 69 is secured to a collar I0 by a pin II, the collar surrounding the shaft 65 and the pin extending through a longitudinal slot 12 in the shaft 66 so that when the collar is shifted, the end of the key may be brought into engagement with any one of the gears 61 for driving connection thereof with the shaft 56.

The collar I0 is received in the fork end 13 of an arm 14 which at its outer end has pin-andslot connection I5 with a lever 16 extending from the lower end of the sleeve 11 surrounding the shaft 51 above the bevel gear 56. The upper end of the sleeve 11 has an actuating lever I8 extending therefrom, and when this lever is turned for swing of the lever IS, the arm I4 is moved to shift the collar I0 along the shaft 56 for movement of the key 00 for the desired gear 61 and the resulting speed variation in drive of the shaft 52. Thus, the power drive for the screw shaft 40 may be set for any desired rate of travel of the master head and the ram structure.

The table structure T is mounted on the top wall 19 of the base structure B. The table comprises a lower part and an upper part 8|. The lower part 80 has dovetail ends 82 and 83 receiving the front and rear dovetailed edges 84 and 85 of the base top wall I0 for guiding the lower table part laterally on the top wall I9. The upper table part 8| has dovetail connection 36 with the lower table part, as clearly shown in Figures 1 and 2, for fore and aft movement of the top table part on the lower part.

At the front edge of the upper table part (Figure 4) is a depending housing 8'! for journalling the head 88 of a screw shaft 89 which has threaded engagement with a bushing 90 secured in the front side of the lower table 80, the rear end of the screw shaft being guided in the passageway 9| at the rear end of the lower table 80. Within the housing 81, the screw shaft head carries a gear 92 meshing with a pinion 93 on a shaft 94 mounting at its outer end a hand wheel 95. Upon turning of the hand wheel, the screw shaft is turned in the bushing 90, and the upper table part 8| will be shifted fore and aft on the lower table part.

The setting and operating means for the lower table part are best shown in Figures 1, 8 and 9. The lower table part has at its opposite sides housings 06 and 91 depending therefrom. Journalled in these housings and extending transversely along the front of the base B is a shaft 98 which at its outer ends has hand wheels 99 and 99 respectively, by which the shaft may be manually operated. Rearwardly of the shaft 98 is a screw shaft I00 which extends through the base B. The shaft I00 has threaded engagement with a bushing IOI secured to the left side wall of the base, passes through a passageway I02 in the opposite side wall of the base, and then passes through the housing 4'! into the clearance passageway I03 in the housing 97, as clearly shown in Figure 8.

Within the housing 06, the screw shaft I00 carries a gear I04 meshing with a pinion I05 on theshaft 08 so that, upon turning of the shaft 98, the screw shaft will'be rotated in the stationary bushing IIlI and the entire table structure will be shifted laterally on the base top 19.

Means are provided for power drive of the screw shaft I00. Referring to Figures 8 and 9, the front end of the housing 41 has a detachable extension I06 through which the shaft 98 extends, the housing extension providing bearings I01 forthe shaft, between which bearings engages a worm gear I08 keyed to the shaft. Below the worm gear I08 and in axial alignment with the shaft 64 of the transmission gearing within the housing 41 is a shaft or spindle I09 which at its inner end engages in the axial bore H in the outer end of the shaft 54 which is journalled in the adjacent wall of the housing 41 by a bearing II I. At its outer end, the shaft I09 extends through the separated bearing portions H2 and H3 on the housing extension I06, and mounted on the shaft between these bearing portions is a worm pinion I I4 which meshes the worm gear I558. The pinion has a key extending into a slot II5 in the shaft so that the shaft may be shifted axially relative to the pinion. H

The shaft I89 has an enlarged or hub part I I6 engaging in a bearing II1 supported in the end wall of the housing 41, the housing extension I06 being provided with a recess II8 into which the part IIB may extend when the shaft I09 is shifted outwardly, the shaft having a knob H9 at its outer end whereby it may be readily shifted in or out.

Keyed to the inner end of the shaft enlargement H8 is an internal gear I20 for engaging the gear I2I secured to the outer end of the shaft 64. When the shaft H9 is in its inner position, as shown on Figure 9, the annular or internal gear I20 will be in mesh with the gearI2I on the shaft 64 so that the shaft I59 will be poweroperated from the motor 48, through the shaft 49, worm pinion 5t, and worm gear 5I connected with the, shaft 54. Rotation ofthe shaft I03 will be communicated by the pinion II4 to the gear I08 on the shaft 38 and then, through the gearing connections I05 and I04, the screw shaft I00 W111 be turned and the table structure will be moved laterally on the base B. When the shaft I05 is pulled out, the gear I20 thereon'will .be

unmeshedfrom the gear I2I on the shaft 64.

l. have already described how the screw shaft 40 for the master head end may be power-driven from the motor 48, either directly or through transmission gearing. Referring to Figures 8 and 9, the key 69 may be set into neutral position so that the motor 48 may efiect drive only of the table structure when the shafts I09 and 64 are geared together. By setting of the key 69 of the transmission gearing, as has been explained hereinbefore, the master head may also be power shifted by the motor 48 at any desired speed so that, for example, tools operated by the master head may be fed relative to work on the table while the table is being power shifted on the base B.

' Referring again to the master head, this head may be used in a variety of ways for feeding,

driving or otherwise operating different tools or tool supporting attachments applied to the head. Referring particularly to Figures 4, 6 and 10, a shaft I22 is suitably journalled in the front and rear walls of the master head frame or housing 30, the outer end of the shaft being shaped to provide a tapered recess or socket I23 which serves to receive and to centrally locate tools or attachments applied tothe head Within the housing 36, the shaft has keyed thereto a driving gear I24. Extending vertically through the housing 36 is a shaft I25. This shaft carries. a worm I26 which is meshed by a worm gear I21 on the countershaft I28 which countershaft also supports a gear I29 which meshes with the gear An intermediate wall I30 in the housing 36 journals the shaft I25, a step bearing I3I journalling the lower end of the shaft. Above the intermediate wall 30 is a gear chamber I32 having a cover I33. The shaft I25 continues upwardly through the chamber I32 and the cover and extends through the tubular hub I34 of a gear I34 which surrounds the shaft I25 below the cover I33. The hub of a pulley I35 surrounds the hub I34 and is secured thereto as by a set screw I36. A hearing I31 in the cover receives and journals the gear hub I34.

A countershaft I38 is journalled in the crosswall I30 and cover I33 and has a gear I39 secured thereto which is meshed by the gear I35. Another gear I40 which is secured on the shaft I38 meshes with the gear I keyed to the shaft I25 within the chamber I32. The shaft I38 is vertically slidable downwardly to unmesh the gears I39 and I40 from the gears I35 and MI, a spring I42 tending to hold the shaft in its upward position for meshing of the gears, a cam lever I43 being provided for depressing the shaft I38 when unmeshing of the gears is desired.

The outer end of the shaft I25 which extends through th gear I34 and the pulley has a bore I44 for a key-operating pin I45. Between the outer end of the pulley and the shaft I25 is interposed a bearing I46, and below this bearing the pulley has the keyway I41. Within the pin I45 is a key I 48 pivoted at its lower end on a. pin I49. When the pin I45 is in its outer position, as shown in fulllines on Figure 6, the end of the key will be within the bearing I46 and out of the pulley keyway I41 so that the pulley will drive only the gear 134 and, when the transmission shaft I38 is in its upward position, the gears and the shaft will transmit the rotation of the gear I34 to th gear I4I on the shaft I25 for rotation of this shaft at reduced speed. If it is desired to drive th shaft I25 directly, the cam lever I43 is operated to shift the shaft I38 downwardly for unmeshi-ng of the transmission gears, and the pin I 45 is shifted inwardly to the. position shown on Figure 10, in which position the key I48 will engage in the pulley keyway I41 and the pulley will then directly drive the shaft I25, rotation of the shaft being transmitted to the driving shaft I22 of the master head through the gearing I26, I 21, I29 and I24. The pin I45 has detent channels I55 for engagement by a spring-pressed detent ball I5I for yieldably locking the pin in its inner or outer position.

A motor I52 is mounted on the master head for power drive of the shaft I22. As. shown on Figures 1 and 2, this motor is supported by a bracket I53 detachably mounted on the master head frame 36. The bracket may have a dovetail key I54 thereon for engagement in the dovetail slot I55 provided on the fram 35 and the bracket may be adjusted along this slot. A pulley I50 is secured to the motor shaft for connection by a of the master head .and'moves therewith during vertical movement of the master head on the ram structure.

Figures 11 and 12 show a vertical head V which may be mounted on the master head. The master head has a cylindrical boss I58 on its front wall around the shaft I 22, and threaded holes I59 are provided through this boss and the front wall of the head frame 36 for securing of the vertical head or other attachment to the master head, the threaded holes preferably being arranged in a circular row so that the attachment may be adjusted rotationally on the master head. The vertical head V shown on Figures 11 and 12 comprises a housing I60 whose rear wall has elongated slots I6I for the passage of screws I62 into threaded engagement with the master head openings I59 to secure the vertical head to the master head. Journalled in the upper and lower walls of the housing I60 is the vertical spindle I63 mountin at its upper end a pulley I64. Within the housing the spindle has keyed thereto a bevel gear I65. 7

On the front wall of the master head is a smaller centering boss I66 and in the rear wall of the vertical head housing I60 is a, passageway I61 to receive this centering boss, an annular inwardly extending flange I68 on the rear wall of the vertical head housing forming a continuation of the passage I61. Within the flange I68 is a ring I69 in which a bevel gear I10 is journalled by the ball bearings I1 I, the gear meshing with the bevel gear I65 on the spindl I63. Within the conical socket I23 at the end of the master head shaft I 22 is inserted a frusto-conical cup I12 for frictional engagement therewith. This cup or collet has a cylindrical bore for a cylindrical coupling bar I13 which has a key I14 engaging with the cup and with the hub of the gear I10 so that, as the cup is frictionally driven by' the master head shaft I22, such drive will be communicated by the coupling bar I13 to th gear I10 for drive thereby of the gear I65 and the vertical spindle I63. An abutment screw I15 threads through the bottom of the cup I12 for holding the coupling bar connected with the gear I10, a springpressed plunger I16 within the gear I10 abutting the spindle I63 for keeping the gear I 10 in proper meshing relation with the gear I65.

With the arrangement described, the spindle I63 will be driven from the master head spindle;

are available by virtue of the direct connectionof the pulley with the shaft I or the connection through the reduction gears I39 and I40, as has already been explained.

Instead of driving the vertical spindle I63 through the master head shaft, it may be directly driven by a belt I11 connecting between the pulley of the motor I52 and the pulley I64, and with a number of pulley grooves provided, the spindle I63 may thus be driven directly from the motor at various speeds. When the spindle. is to be directly driven by the motor, the gear I10 should be released from the gear I65 on the spindle. The master head shaft I22 is provided with a bore I18 through which a suitable tool may be inserted for operation of the set screw I15,..elther for shifting of the gear I10 to mesh with thegear I65 or for withdrawal of the gear I10. By unscrewing the set screw, the spring-pressed plunger I16 will shift the gear I10 and its supporting ring I69 rearwardly in the flange I68 for unmeshing of the gear I10 from the gear. I65, the con. necting bar I13 then moving rearwardly in the cup or collet I12. The spindle I63 has the socket I19 in its lower end for receiving collets or other parts for securing tools or attachments to the spindle.

Auxiliary heads A may be attached to the vertical head V with tool supporting parts therein to be driven from the spindle I63. As shown on Figure ll, the side walls of the vertical head housing I60 have centering bosses I80 for receiving the bases I8I of auxiliary heads such as the heads A. Threaded holes I82 may be provided in the side walls of the head V for receiving screws extending through the bases of auxiliary heads so that these auxiliary heads may be set in any desired angular position on the vertical head.

Each of the auxiliary heads shown journals a vertical spindle I83 adapted to support tools, a drive shaft I84 extending into the body of the vertical head, the vertical spindle having a bevel gear I85 meshing with a bevel gear I86 at the outer end of the drive shaft. At its inner end each drive shaft I84 carries a bevel gear I81, and these bevel gears mesh with the bevel gear I88 on the spindle I63 of the vertical head V. Each of the spindles I83 is provided with a tool receiving socket I89. Thus, a number of spindles may be driven at the same time for gang operation, as, for example, gang drilling or other work. As the vertical head V is adapted for setting on the master head in various angular positions, and the auxiliary heads A are adapted for setting to various angular positions on the vertical head, the driven tools may be operated at any desired angle relative to the work on the table structure T.

On Figure 13, a modified auxiliary head A is shown. This head, like the auxiliary heads A in Figure 11, are adapted to be mounted on the vertical head. The auxiliary head A is useful where a tool is to be vertically moved or reciprocated. The drive shaft I84 is therefore provided at its outer end with a crank head I90 having a crank pin I9I extending between abutment collars I92 and I93 on the work-holding spindle I94 journalled in the head. In some instances, it will be desirable to effect rotation or rotary feed of the spindle and tool thereon during reciprocation thereof and, as shown, a worm gear I95 is connected by a spline I96 to a spindle I94 and is en gaged by a worm pinion I91 on a shaft I98 journalled in the head, the shaft being provided with a hand wheel I99 so that the rotational feed or adjustment of the tool supporting spindle may be manually controlled.

With an arrangement such as shown on Figure 11, multiple milling, engraving or duplicating may be accomplished, that is, a number of work pieces may be simultaneously operated upon and formed in accordance with a master work piece or pattern P. In the arrangement shown in Figure 11, three work pieces can thus be simultaneously operated on by suitable tools supported from the main spindle I63 and auxiliary two spindles I83 on the auxiliary heads. By adjustment of the table structure and. the vertical movement of the ram with the tool-supporting heads thereon, the work pieces are applied to the tools, and to enable such application to be made with precision, I provide a stylus unit S. The stylus unit shown is supported on an arm 200 extending from a base 20I which may be detachably applied in one of the dovetail channels in the master head frame (Figure 6). A stylus 202 is vertically shiftable on the stylus structure body and connected at its upper end with a pointer 203 on a dial 204. The lower end of the sty1us-enorder that this may be conveniently accomplished, an operating lever is provided for the ram shaft 21 which is ordinarily driven by the motor 29. As best shown on Figures 5 and 14, a hub or drum 205 is keyed on the shaft 2! outside of the base B, this drum being engaged by the companion clutch members 206 and 201 hinged together at one end, as indicated at 208. A tubular handle bar or lever'209 extends from the clutch member 296, and a rod 210 extends through the lever and is attached at its lower end to the clutch member 201. A bell crank hand lever 2| I is pivoted at 2 I 2 to the lever 209 with its lower leg pivoted to the outer end of the rod2l0, a spring 2l3 being interposed between the grip end of the bell crank lever and the end of the lever 209. The spring tends to swing the bell crank lever to pull the rod for clamping of the clutch drum by the clutch members, and pressure on the grip of the bell crank lever will release the clutch members. With this arrangement, the lever 299 may be used to turn the shaft 21 to effect vertical movement of the ram, and by clutching and unclutching the clutch members by operation of the grip lever, the shaft 21 may be quickly and accurately turned for movement of the ram. As shown on Figure 1, the clutch lever is at the right side of the base B so as to be readily operable from the front of the machine by the machine operator.

. I thus provide a compact machine which may be used for a great variety of work performance which ordinarily was performed on separate machines. I do not, however, desire to be limited to the exact construction, arrangement and operation shown and described, as changes and modifications may be mad without departing from the scope of the invention.

I claim as my invention:

1. A machine of the class described comprising a pedestal, a ram mounted on said pedestal for vertical reciprocation, driving means for said ram on said pedestal, a work supporting table structure on said pedestal, a head mounted on said ram above said table structure for vertical movement on said ram, a power source on said pedestal, and a transmission train between said power source and said head including transmission gearing for movement of said head on said ram at variable speeds.

2. A machine of the class described comprising a pedestal, a ram vertically movable on said pedestal, adjustable driving means on said pedestal for said ram, a work-supporting table structure on said pedestal, a head mounted on said ram above said table structure and adapted for vertical movement thereon, a driving motor on said pedestal and a shaft to be driven thereby, speed change transmission gearing on said pedestal between said motor and said shaft, a transmission train between said shaft and said head for movement of said head on said ram, a work spindle in said head for operating tools supported by said head, a driving motor mounted on said head, and adjustable driving means between said head motor and said spindle.

3. A machine of the class described comprising a pedestal, a ram mounted on said pedestal for vertical movement thereon, a work-supporting table structure on said pedestal, a head to which various tool-supporting attachments or adapters may be detachably secured, said head being mounted on said ram above said table structure for vertical movement on said ram, a work shaft journalled in said head and adapted for driving connection with attachments applied to said head, a driving motor mounted on said head, and variable speed transmission means in said 'head for said work shaft adapted to be driven by said motor.

4. A machine of the class described comprising a pedestal, a work-supporting table on said pedestal, a ram on said jpedestalrisingabove said table, a head to which 'adapters or tool-support: ing attachments may be detachably applied, said head being mounted on said ram above said table for vertical movement on the ram, a horizontally extending work shaft in said head adapted at'its outer end to directly receive tools to be driven or for coupling connection with adapters or attach: ments applied to said head, a vertical .drive shaft.

i in said head connected with said work shaft, re-

duction gearing in said head, a drive pulley on said head adapted for connection directly with said vertical drive shaft or through said reduc-' tion gearing, and a driving motor on said head having a driving pulley belt connected with said head pulley.

5. A machine of the class described comprising a pedestal, a ram vertically reciprocable on said pedestal, means controlling the reciprocation of said ram, a work-supporting table structure shiftable on said pedestal, a head mounted on said ram above said table structure for vertical movement thereon, power means, a driving connection between said power means and said head andv a, driving connection between said power means and said table structure, and means for settingjsaid driving connection for separate or simultaneous movement of said head and table structure for application of tools on said head to work on the table structure.

6. A machine of the class described comprising a pedestal, aram vertically movableon said pedestal, a work-supporting table on said pedestal,

ahead mounted on said ram above saidjtable for vertical movement thereon, a power source, a transmission train for connecting said power adjustment of said table on said pedestal;

7. A machine of the class describedcomprising a pedestal, a work-supporting table on said pedestal, a wall extending upwardly from said pedestal, a head to which adapters or tool-supporting attachments maybe detachably applied, said head being mounted on said wall for vertical movement thereon above said table, a horizontally extending work shaft in said head adapted at its outer end to directly receive tools to be driven or for coupling connection with adapters or attachments applied to said head, a vertical drive shaft in said head connected with said work shaft, reduction gearing in said head, a motor on said head, a drive connection between said motor and said vertical shaft, and setting means adjustable to cause either direct drive of said vertical shaft or drive thereof through said reduction gearing.

8. A machine of the class described comprising a pedestal, a work-supporting table on said pedestal, a wall extending vertically upwardly from said pedestal, a master head mounted on said wall for vertical movement thereon above. said table, driving means for moving said master head at a predetermined rate, a horizontally extending work spindle j ournalled in said master head, driving means in said master head for said spindle, a driving motor mounted on said master head for operating said driving means, a centering boss on the front wall of said master head concentric with said spindle, a vertical head receiving said boss and detachably secured to said master head, a

vertical spindle in said vertical head, driving.

means for said vertical spindle in said vertical head, and drive coupling means for connecting said vertical spindle driving means with said spindle in the master head.

9. A machine of the class described comprising a pedestal, a work-supporting table on said pedestal, a wall extending vertically upwardly from said pedestal, a master head mounted on said wall for vertical movement thereon above said table, driving means for moving said master head at a predetermined rate, a horizontally extending work spindle journalled in said master head, driving means in said master head for said spindle, a driving motor mounted on said master head for operating said driving means, a centering boss on the front wall of said master head concentric with said spindle, a vertical head receiving said boss and detachably secured to said master head, a vertical spindle in said vertical head, driving means for said vertical spindle in said vertical head, drive coupling means for connecting said vertical spindle driving means with said spindle in the master head, auxiliary heads mounted on said vertical head, a work spindle for each of said auxiliary heads, and driving means for said auxiliary head spindles adapted to be driven by the spindle in said vertical head, said auxiliary heads being rotatably adjustable on said vertical head.

10. A machine of the class described comprising a pedestal, a ram vertically movable on said pedestal, driving means on said pedestal for said ram, a work supporting table structure on said pedestal, a head mounted on said ram above said table structure and adapted for vertical movement thereon, a driving motor on said pedestal, a transmission train between said driving motor and said head for efiecting movement of said head on said ram, supporting means on said head for supporting tools or adapters to be driven, a driving motor mounted on said head, and driving means between said head motor and said supporting means.

11. A machine of the class described comprising a pedestal, a work-supporting table on said pedestal, a wall extending upwardly from said pedestal, a master head mounted on said wall for vertical adjustment thereon above said table, a horizontally extending work spindle journaled in said master head, driving means in said master head for said spindle, a motor mounted on said master head for operating said driving means, a centering boss on the front wall of said master head concentric with said spindle, an auxiliary head receiving said boss for rotational adjustment relative to said master head and to be detachably secured in adjusted position, a tool supporting spindle journaled in said auxiliary head, and a friction drive connection between the master head spindle and the auxiliary head spindle.

12. A machine of the class described comprising a pedestal, a work-supporting table on said pedestal, a wall extending vertically upwardly from said pedestal, a master head mounted on said wall for vertical movement thereon above said table, means controlling the vertical movement of said head, a horizontally extendin work spindle journaled in said master head, driving means in said master head for said spindle, a driving motor mounted on said master head for operating said driving means, an auxiliary head adjustable rotatably on said master head and detachably secured thereto, a tool driving spindle in said auxiliary head, a beveled gear on said auxiliary head spindle, a driving beveled gear in said auxiliary head concentric with said master head spindle and engaging said auxiliary head spindle gear, and a detachable driving connection between said master head spindle and said driving beveled gear.

13. A machine of the class described comprising a pedestal, a work-supporting table on said pedestal, a wall extending vertically upwardly from said pedestal, a master head mounted on said wall for vertical movement thereon above said table, means controlling the vertical movement of said head, a horizontally extending work spindle journaled in said master head, driving means in said master head for said spindle, a driving motor mounted on said master head for operating said driving means, an auxiliary head adjustable rotatably on said master head and detachably secured thereto, a tool driving spindle in said auxiliary head, a beveled gear on said auxiliary head spindle, a driving beveled gear in said auxiliary head concentric with said master head spindle and engaging said auxiliary head spindle gear, and a friction drive connection between said driving beveled gear and the spindle in said master head.

FRANK W. HACK. 

